Steam generator



' NOV. 11, 1930. w, STRQM 1,781,653

STEAM GENERATOR Filed March 13, 1928 y kgg (1&1 L. I

3 gme'ntoz .E'dwm 7/4152707724 Patented Nov. 11, 1930 EE s'rrss PATENT QFFICE EDWIN W. STROM, OF WOBURN, MASSACHUSETTS, ASSIGNOR- OF ONE-HALF T PAUL BILEZIKIAN, OF WATERTO'WN, MASSACHUSETTS, AND ONE-HALF TO ARAKEL S. BILEZIKIAN, OF NEWTON, MASSACHUSETTS STEAM GENERATOR Application filed March 13, 1928. Serial No. 261,321.

This invention relates to a steam generator outfit designed for the use of tailors and. pressers and has for its primary object the provision, in a manner as hereinafter set forth, of means for generating a working pressure of steam quickly and for maintaining the working pressure during the entire period in which the pressing machine with which it is connected is in operation.

The present outfit is designed to receive approximately three gallons of water which is heated at the rate of about two and one half pounds per minute raising the temperature from forty degrees to the boiling pointin approximately twelve minutes and reaches a Working pressure of fifty pounds, in approximately forty minutes. Means are pro vided for regulating pressure at any desired point. With similar devices at present in use there is a great loss of heat and these devices do not heat faster than one pound of water per minute taking approximately one and one-half hour to heat to a proper working pressure. It has been found that heating boilers of the type to which this present boiler relates do not maintain the steam pressure constant and at the proper working temperature when the device is in use. The present structure is designed to overcome these difficulties through the use and connection of the apparatus hereinafter described.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming a part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing but may be changed. or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claim.

In the drawing:

Figure 1 shows the steam generating outfit embodying the present invention, set up for use.

Figure 2 is. a central longitudinaltion through the lower portion of the boiler showing the heating units therein.

Figure 3 is a bottom plan view of the boiler showing the arrangement of the heating unit.

Figure 4 is a view taken substantially upon the line el4c of Figure 1.

Referring now to the drawing in detail, wherein likenumerals of reference indicate corresponding parts throughout the several views, the numeral 1 indicates a steam boiler of an appropriate design, designed to contain approximately three gallons of water. The lower end of the boiler 1 is closed by the electric unit carrying plate 2, the electric units supported thereby being indicated by the numerals 3. Each of these units 3 is threadably engaged in the plate 2 in the manner shown and have their heating coils 4 ei-ztending upwardly into the boiler 1. These coils are of the usual insulated type, each being a standard electric immersion heater drawing approximately two kilowatts of current.

Adjacent its lower end the boiler body 1 is provided with a pair of nipples 5 and 6 into one of which as for example the nipple 5, a water supply pipe 7 leads, this pipe being controlled by a valve 8.- Into the other nipple there leads a steam return pipe which is connected to the machine in connection with which the generatin outfit is used, this pipe being indicated by the numeral 9 and having a one way or trap valve 10 therein.

At approximately the central portion of the boiler 1 is located a water gauge 11 having the usual cut-off valve 12 at each end, which gauge is employed to indicate the height of the water in the tank.

In addition to the gauge 11 the boiler is provided with a series of try cocks 13 which are arranged in different planes as shown in Figure 1 and by means of which the height of the water in the boiler can be determined.

The top of the boiler 1 is provided with a blow-off or safety 14, a steam pressure indicator 15 and a steam lead-off pipe 16 which conveys steam to the machine for use.

Current is supplied to the immersion heat ersf: through the line 17 which leads from a magnetically controlled switch 18 which may be of any appropriate make. This magnetic switch 18 is supplied through the line 19 which in turn is cont-rolledby a main contr ol switch 20. a a

The current supply to the heaters 3 is regu-' lated by means of a pressure switch 21 which switch like the magnetic switch 18 may be of any desired construction, this pressure switch having the a electric current line 22 leading therefrom to the magnetic switch.

Leadingfrom the boiler 1 is a pipe line 23 which goes through the magnetic switch and through which the-water pressure within the boiler is transmitted so that when the pressure reaches a predetermined point the pressure switchwill operate to actuate the magnetic switch which in turn will open. or close the circuit to the immersion vheaters in acheat into the surrounding atmosphere. i

As is clearly shown in Figure 2 the plate 2 wh1ch carries the immersion heaters 3 is substantially pan-shaped and receives in the surrounding inside groove 25 the loweredge of V the boiler body 1. To this plate there is secured suitable supporting legs 26 which support the boiler structure. A draw-0E '27 is provided which opens through the plate 2 in the manner clearly shown in Figure 2.

From the foregoing description it will be readily seen that upon closing the switch 20 which controls the main supply line of the current theimmersion heaters will'become enener ized and these heaters are designed to heat the contents oi the boiler to a working pressure and maintain tnis pressure aslong as steam formed therein is being used. In the event'tnat the pressure becomes excessive it will be transmitted through the pipe line 23 to the pressure switch 21 which switch 7 will operate to actuate themagnetic switch 18 which in turnwill break the current supply to the heaters and thus permit the boiler to cool down until the pressure therein has returned to normal.

From the foregoing description it will be readily seen' that there has been provided a compact and efiicient steam generating sy tem which is serviceable and comparatively inexpensive to set up.

Having thus described my invention what I claim is:

open end of the boiler and including a fiat cal side wall of the body, and a plurality of electric immersion heaters carried directly by the lower wall of said plate and extending ifptp the body, as and for the purpose speciec. v i c In testimony whereof I afiix my si nature.

' EDWIN W. STROM. 

